The UNIMAX 22 starter kit has a compact design and petite size. The UNIMAX 22 atomizer can hold 2ml e-liquid and has leak-resist cup design to solve leaking problem. The TFTA system is very easy to operate. The BFL series coil head is designed for DL inhales. The UNIMAX 22 battery although has petite body and features 2200mah built-in capacity, it is powerful and will provide great vaping experience. There are two kinds of mode apply for battery: Direct Output mode and Constant Voltage Output mode. The UNIMAX 22 atomizer comes with UNIMAX mouthpiece. Make sure it is in position before put it in. You can use normal 510 mouthpiece as well. This kit also can be charged via USB cable.